Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 18, issue 8
Articles | Volume 18, issue 8
https://doi.org/10.5194/nhess-18-2111-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-18-2111-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 8
Research article
 | 
08 Aug 2018
Research article |  | 08 Aug 2018

Development of fragility curves for road bridges exposed to volcanic lahars

Joaquín Dagá, Alondra Chamorro, Hernán de Solminihac, and Tomás Echaveguren

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Short summary
One of the main volcanic processes affecting road bridges are lahars, which are flows of water and volcanic material running down the slopes of a volcano. In this paper, bridge failure models due to lahars are proposed and, based on these, fragility curves are developed. Fragility curves are parameterized by maximum likelihood estimation, assuming a cumulative log-normal distribution. Bridge failure models are empirically evaluated using data of 15 bridges that were affected by lahars.
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